Locomotive fire box



Match 19, 1929. 4 p, 1 CONLEY 1,705,718

LOCOMOTIVE FIRE BOX March 19, 1929. P. .1. coNLEY 1,705,718

LocoMoTIvE FIRE Box Filed Oct. 19, 1925 2 Sheets-Sheet 2 o o o 5 o oPatented Mar.` 19, 1929. l

'Unirse 4STATES PATENT y"olrl'iczlz; ,I

v PATRICK par. coivLnY,y or GAL'vEsroN, TEXAS.

' LocoMoTIvE FIRE Box.

Applcationvled Qctober 19, 1925. ySerial No. 63,37"7 j Thisinventionrelates to new and useful improvements in a locomotive rebox'.

One object of the invention is to provide a boiler having an improvedtype of lire box and adapted for general use, and more par ticularly forapplication to locomotives whereby a more efficient utilization of thethe-furnace from the'burner.

A still further feature of the invention re.- sides in the provision ofa novel type of boiler furnace equipped with means for controlling thesupply of air thereto to the end that said furnace may be completelyclosed when the fire is extinguished to retain the heat in the furnaceand to prevent sudden changes 'of temperature and the consequent injuryto the furnace caused thereby.

With the above and other objects inl view this invention has particularrelation to cer-V tain novel features of construction, operation andarrangement of parts, an example of which is given in thisspecificationand illustrated in the accompanying drawings,

wherein y u Figure l shows a longitudinal sectional view of the improvedtype of boiler, equipped with a novel type of oil burning furnace, andFigure 2 shows a cross sectional view thereof taken on the line 2 2 ofFigure 1. Y

leferring now more particularly to the drawings, wherein like numeralsof reference designate similar parts in each of the figures, the numeral1 designates the boiler as a whole which is provided with the furnace2.- In the type shown in Figures 1 and 2 the furnace is supplied withfuel from the burner 3, which is anchored to the front wall thereof, and

the front side of the furnace. This chamber has an air inlet 5, which`is controlled by the the furnace forming a part of the bottom of whichis enclosed in the chamber 4:, adjacentv ysaid furnace.4 The-se wallsare hot and'heat the air passing through said flue before it enters thefurnace.

The air for the furnace enters the inlet 5 and passes thence upwardlyinto the flue .7, at one end, and thence valong said iiue to its otherend, and thence downwardly through the passageway 8 into the main airliuc 9` which enters the furnace 2 from beneath. j vThe boiler has theusual smoke stack 10 near its front endin front of the boiler tubes 11.There is a vapor line 12, one end of which projects into the front endof the boiler, and terminates in the smoke boX adjacent the rsmokestack,and whose other end enters the main air flue k9. v The furnace draftwill create a suction through the line 12 but a nozzle pipe 12 maybeconnected with a convenient steam line of the boiler and its dischargeend turned into theupper'end of the vapor line so that a forced draftmay be thereby created through said line 12, if desired. v

A part of the products of combustion will pass out of the smoke stack,but a considerable portion thereof will be diverted through the vaporline 12, and returned to the furnace for further consumption. These hotvapors f will also mingle with the fuel being ejected from the burnerresulting in a more complete combustion thereof,

Y yThe oil line 13, which supplies oil to thel burner 3 has a controlvalve 14, which is con` trolled by theV valverod 15. Thisrod has alateral arm 16 andthe stem of the valve, or shutter, 6 has an arm 17,fixed thereto, and

the arms 16 and 17 are connected by a link 18 to the end that theshutter 6 will be opened and closed simultaneously with thecorresponding movements of the valve 14;, and the v 1 airsupplycontrolled to meet the requirements of the fuel supply. When the fuel iscompletely cut olf and thel fire'extinguished the air inlet will also becompletelyclosed to prevent the inlet of cold drafts of air and a toosudden cooling of the interior of the fur-.

nace.

What I claim is v 1*. In a boiler having a furnace and having'a chamberadjacent the front end of the furnace and a main air flue entering thefurnace beneath the chamber, said chamber being provided with an airinlet, a valve controlling said inlet, a transverse air iiue above saidchamber ywhose top and side walls lie adjacent the furnace, said inletentering said transverse flue at one end and there being a passagewayleading downwardly into the main air flue from the other end oi saidtransverse flue, a vapor line leading from the front end of the boilerand terminating in the main air flue of the furnace.

2. In a boiler having a furnace at one end and a smoke box at its otherend and tubes between said furnace and smoke boX, a main l air flueentering the forward end of the furnace, a chamber above said main airflue having an air inlet, a shutter valve controlling said inlet, atransverse flue above said cham-V ber one end of which communicates withthe chamber there being a passageway connecting the other end or' lthetransverse lue with said main air inlet and a vapor line leading fromVthe smoke box of the boiler in front of said tubes and entering the mainair inlet.

In testimony whereof I have signed my namel to this specification.

PATRICK J. CONLEY.

